s = {1,2,3,"你好"}
print(type(s))
print(s)

# s2 = {1,2,3,"你好",[]}
# print(s2)

s3 = set()
s3.add("天才")
s3.add("你好")
s3.add(5)
s3.add(6)
print(s3)

s4 = {1,2,3,4,"林"}
s4.remove(4)
print(s4)
s4.remove("林")
s4.add("天才朱序")
print(s4)

for i in s4:
    print(i)